diff options
Diffstat (limited to 'src/lib/crypto/krb/aead.c')
| -rw-r--r-- | src/lib/crypto/krb/aead.c | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/src/lib/crypto/krb/aead.c b/src/lib/crypto/krb/aead.c index c1f8ccd9e6..3d9111abb4 100644 --- a/src/lib/crypto/krb/aead.c +++ b/src/lib/crypto/krb/aead.c @@ -53,184 +53,6 @@ krb5int_c_locate_iov(krb5_crypto_iov *data, size_t num_data, return iov; } -#ifdef DEBUG_IOV -static void -dump_block(const char *tag, - size_t i, - size_t j, - unsigned char *block, - size_t block_size) -{ - size_t k; - - printf("[%s: %d.%d] ", tag, i, j); - - for (k = 0; k < block_size; k++) - printf("%02x ", block[k] & 0xFF); - - printf("\n"); -} -#endif - -static int -process_block_p(const krb5_crypto_iov *data, - size_t num_data, - struct iov_block_state *iov_state, - size_t i) -{ - const krb5_crypto_iov *iov = &data[i]; - int process_block; - - switch (iov->flags) { - case KRB5_CRYPTO_TYPE_SIGN_ONLY: - process_block = iov_state->include_sign_only; - break; - case KRB5_CRYPTO_TYPE_PADDING: - process_block = (iov_state->pad_to_boundary == 0); - break; - case KRB5_CRYPTO_TYPE_HEADER: - process_block = (iov_state->ignore_header == 0); - break; - case KRB5_CRYPTO_TYPE_DATA: - process_block = 1; - break; - default: - process_block = 0; - break; - } - - return process_block; -} - -/* - * Returns TRUE if, having reached the end of the current buffer, - * we should pad the rest of the block with zeros. - */ -static int -pad_to_boundary_p(const krb5_crypto_iov *data, - size_t num_data, - struct iov_block_state *iov_state, - size_t i, - size_t j) -{ - /* If the pad_to_boundary flag is unset, return FALSE */ - if (iov_state->pad_to_boundary == 0) - return 0; - - /* If we haven't got any data, we need to get some */ - if (j == 0) - return 0; - - /* No boundary between adjacent buffers marked for processing */ - if (data[iov_state->iov_pos].flags == data[i].flags) - return 0; - - return 1; -} - -krb5_boolean -krb5int_c_iov_get_block(unsigned char *block, - size_t block_size, - const krb5_crypto_iov *data, - size_t num_data, - struct iov_block_state *iov_state) -{ - size_t i, j = 0; - - for (i = iov_state->iov_pos; i < num_data; i++) { - const krb5_crypto_iov *iov = &data[i]; - size_t nbytes; - - if (!process_block_p(data, num_data, iov_state, i)) - continue; - - if (pad_to_boundary_p(data, num_data, iov_state, i, j)) - break; - - iov_state->iov_pos = i; - - nbytes = iov->data.length - iov_state->data_pos; - if (nbytes > block_size - j) - nbytes = block_size - j; - - memcpy(block + j, iov->data.data + iov_state->data_pos, nbytes); - - iov_state->data_pos += nbytes; - j += nbytes; - - assert(j <= block_size); - - if (j == block_size) - break; - - assert(iov_state->data_pos == iov->data.length); - - iov_state->data_pos = 0; - } - - iov_state->iov_pos = i; - if (i == num_data) - return FALSE; - - if (j != block_size) - memset(block + j, 0, block_size - j); - -#ifdef DEBUG_IOV - dump_block("get_block", i, j, block, block_size); -#endif - - return TRUE; -} - -krb5_boolean -krb5int_c_iov_put_block(const krb5_crypto_iov *data, - size_t num_data, - unsigned char *block, - size_t block_size, - struct iov_block_state *iov_state) -{ - size_t i, j = 0; - - for (i = iov_state->iov_pos; i < num_data; i++) { - const krb5_crypto_iov *iov = &data[i]; - size_t nbytes; - - if (!process_block_p(data, num_data, iov_state, i)) - continue; - - if (pad_to_boundary_p(data, num_data, iov_state, i, j)) - break; - - iov_state->iov_pos = i; - - nbytes = iov->data.length - iov_state->data_pos; - if (nbytes > block_size - j) - nbytes = block_size - j; - - memcpy(iov->data.data + iov_state->data_pos, block + j, nbytes); - - iov_state->data_pos += nbytes; - j += nbytes; - - assert(j <= block_size); - - if (j == block_size) - break; - - assert(iov_state->data_pos == iov->data.length); - - iov_state->data_pos = 0; - } - - iov_state->iov_pos = i; - -#ifdef DEBUG_IOV - dump_block("put_block", i, j, block, block_size); -#endif - - return (iov_state->iov_pos < num_data); -} - krb5_error_code krb5int_c_iov_decrypt_stream(const struct krb5_keytypes *ktp, krb5_key key, krb5_keyusage keyusage, const krb5_data *ivec, |